I have black screen and fans stop working after boot

Recently I dropped my display so I managed to replace it myself but now I have black screen with no chime and fans stop working after boot. I reckon it’s something’s to do with power circuit board because I can charge it and Caps LED is on, I tried to use it on external display via hdmi adapter but no signal. Tried all resets option nothing works so I’m very puzzled. I don’t have the tools to test whether the board is faulty so it’s whether replace the circuit board or the connector to display